where can i get a dog cage crate with a detachable door? I want my new pup to have the comfort and security of a ten in the kitchen but with the door open pretty much all the time except when I need him to be out of harm's way e.g. when I'm carrying hot stuff around.I have a lovely crate already but the door,when open, poses a trip hazard. Does anyone know where I could get one with a detachable door?